Fix tests for GitHub#zen
Fix tests for GitHub#zen

agamdua/github3.py,sigmavirus24/github3.py,ueg1990/github3.py,itsmemattchung/github3.py,h4ck3rm1k3/github3.py,christophelec/github3.py,icio/github3.py,jim-minter/github3.py,krxsky/github3.py,balloob/github3.py,wbrefvem/github3.py,degustaf/github3.py